The U.S. Department of Energy (DOE) now offers downloadable technical documents that tell how to achieve 50% energy savings in four commercial building sectors: general merchandise, grocery store, lodging, and medium office buildings.
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The documents describe the assumptions, methods, and analyses to save 50% more energy than ASHRAE/IESNA Standard 90.1-2004.
They can be downloaded as PDFs:
• Lodging

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